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Computer Modeling in Engineering & Sciences 2024年第3期138卷 2339-2356页

作者： R.Saravanan R.Muthaiah A.Rajesh school of Computing SASTRA Deemed UniversityThanjavur613401India school of Electrical&Electronics Engineering SASTRA Deemed UniversityThanjavur613401India

This study develops an Enhanced Threshold Based Energy Detection approach(ETBED)for spectrum sensing in a cognitive radio *** threshold identification method is implemented in the received signal at the secondary user based on the square *** proposed method is implemented with the signal transmission of multiple outputs-orthogonal frequency division ***,the proposed method is considered the dynamic detection threshold adjustments and energy identification spectrum sensing technique in cognitive radio *** the dynamic threshold,the signal ratio-based threshold is *** threshold is computed by considering the Modified Black Widow Optimization Algorithm(MBWO).So,the proposed methodology is a combination of dynamic threshold detection and *** general threshold-based detection technique has different limitations such as the inability optimal signal threshold for determining the presence of the primary user *** limitations undermine the sensing accuracy of the energy identification ***,the ETBED technique is developed to enhance the energy efficiency of cognitive radio *** projected approach is executed and analyzed with performance and comparison *** proposed method is contrasted with the conventional techniques of theWhale Optimization Algorithm(WOA)and GreyWolf Optimization(GWO).It indicated superior results,achieving a high average throughput of 2.2 Mbps and an energy efficiency of 3.8,outperforming conventional techniques.

关键词： Cognitive radio network spectrum sensing noise uncertainty modified black widow optimization algorithm energy detection technique

Layered Structural PBAT Composite Foams for Efficient Electromagnetic Interference Shielding

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Nano-Micro Letters 2024年第2期16卷 273-286页

作者： Jianming Yang Hu Wang Yali Zhang Hexin Zhang Junwei Gu school of Chemistry and Chemical Engineering Anhui University of TechnologyMa’anshanAnhui 243032People’s Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072ShaanxiPeople’s Republic of China school of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuPeople’s Republic of China

The utilization of eco-friendly,lightweight,high-efficiency and high-absorbing electromagnetic interference(EMI)shielding composites is imperative in light of the worldwide promotion of sustainable *** this work,magnetic poly(butyleneadipate-coterephthalate)(PBAT)microspheres were firstly synthesized via phase separation method,then PBAT composite foams with layered structure was constructed through the supercritical carbon dioxide foaming and scraping *** merits of integrating ferroferric oxideloaded multi-walled carbon nanotubes(Fe3O4@MWCNTs)nanoparticles,a microcellular framework,and a highly conductive silver layer have been judiciously orchestrated within this distinctive layered *** are consumed throughout the process of“absorption-reflection-reabsorption”as much as possible,which greatly declines the secondary radiation *** biodegradable PBAT composite foams achieved an EMI shielding effectiveness of up to 68 dB and an absorptivity of 77%,and authenticated favorable stabilization after the tape adhesion experiment.

关键词： Electromagnetic interference shielding Layered structure Supercritical carbon dioxide foaming Poly(butyleneadipateco-terephthalate) Microcellular

Self-healing Ga-based liquid metal/alloy anodes for rechargeable batteries

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Nano Research 2024年第3期17卷 1366-1383页

作者： Meijia Song Zhonghua Zhang school of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212000China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJingshi Road 17923Jinan 250061China

With the rapid development of electronics,electric vehicles,and grid energy storage stations,higher requirements have been put forward for advanced secondary *** metal/alloy electrodes have been considered as a promising development direction to achieve excellent electrochemical performance in metal-ion batteries,due to their specific advantages including the excellent electrode kinetics and self-healing ability against microstructural electrode *** conventional liquid batteries,high temperatures are needed to keep electrode liquid and ensure the high conductivity of molten salt electrolytes,which also brings the corrosion and safety ***-based metal/alloys,which can be operated at or near room temperature,are potential candidates to circumvent the above *** this review,the properties and advantages of Ga-based metal/alloys are ***,Ga-based liquid metal/alloys as anodes in various metal-ion batteries are reviewed in terms of their self-healing ability,battery configurations,working mechanisms,and so ***,some views on the future development of Ga-based electrodes in batteries are provided.

关键词： metal-ion batteries Ga-based liquid metal/alloy anodes self-healing capability room temperature

Structural insight into the dual-antagonistic mechanism of AB928 on adenosine A_(2)receptors

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Science China(Life Sciences) 2024年第5期67卷 986-995页

作者： Yuan Weng Xinyu Yang Qiansen Zhang Ying Chen Yueming Xu Chenyu Zhu Qiong Xie Yonghui Wang Huaiyu Yang Mingyao Liu Weiqiang Lu Gaojie Song Shanghai Key Laboratory of Regulatory Biology Institute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai 200241China Department of Medicinal Chemistry School of PharmacyFudan UniversityShanghai 201203China

The adenosine subfamily G protein-coupled receptors A_(2A)R and A_(2B)R have been identified as promising cancer immunotherapy *** of the A_(2A)R/A_(2B)R dual antagonists,AB928,has progressed to a phaseⅡclinical trial to treat rectal ***,the precise mechanism underlying its dual-antagonistic properties remains ***,we report crystal structures of the A_(2A)R complexed with AB928 and a selective A_(2A)R antagonist *** structures revealed a common binding mode on A_(2A)R,wherein the ligands established extensive interactions with residues from the orthosteric and secondary *** contrast,the cAMP assay and A_(2A)R and A_(2B)R molecular dynamics simulations indicated that the ligands adopted distinct binding modes on A_(2B)*** analysis of their chemical structures suggested that AB928 readily adapted to the A_(2B)R pocket,while 2-118 did not due to intrinsic *** disparity potentially accounted for the difference in inhibitory efficacy between A_(2B)R and A_(2A)*** study serves as a valuable structural template for the future development of selective or dual inhibitors targeting A_(2A)R/A_(2B)R for cancer therapy.

关键词： adenosine receptor A2AR A2BR inhibitor dual-antagonism drug discovery

Effect of matrix thermal properties on laser-induced plasma

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Chinese Physics B 2024年第10期33卷 331-336页

作者： Yuheng Shan An Li Xinyu Zhang Wen Yi Ying Zhang Xiaodong Liu Ruibin Liu Key Laboratory of Precision Spectroscopy and Optoelectronic Technology School of PhysicsBeijing Institute of TechnologyBeijing 100081China

The matrix thermal properties have an important impact on laser-induced plasma,as the thermal effect dominates the interaction between ns-pulsed laser and matter,especially in *** used a series of pure metals and aluminum alloys to measure plasma temperature and electron density through laser-induced breakdown spectroscopy,in order to investigate the effect of matrix thermal properties on laser-induced *** pure metals,a significant negative linear correlation was observed between the matrix thermal storage coefficient and plasma temperature,while a weak correlation was observed with electron *** results indicate that metals with low thermal conductivity or specific heat capacity require less laser energy for thermal diffusion or melting and evaporation,resulting in higher ablation rates and higher plasma ***,considering ionization energy,thermal effects may be a secondary factor affecting electron *** experiment of aluminum alloy further confirms the influence of thermal conductivity on plasma temperature and its mechanism explanation.

关键词： laser-induced plasma thermal properties matrix effect thermal storage coefficient plasma temperature

Solvent extraction of scandium from leaching solution of red mud roasted with ammonium sulfate using D2EHPA/TBP

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Journal of Rare Earths 2024年第10期42卷 1943-1949页

作者： Fucheng Li Xinsheng Li Lei Shi Xiang Li Duoqiang Liang Yuezhou Wei Toyohisa Fujita school of Resources Environment and MaterialsGuangxi UniversityNanning530004China State Key Laboratory of Featured Metal Materiais and Life-for Composite Structures Guangxi UniversityNanning530004China school of Nuclear Science and Technology University of South ChinaHengyang421001China

Red mud is an important secondary resource for scandium *** red mud leaching solution containing scandium in this study was derived from environmentally friendly ammonium sulfate roasting and water leaching process.A synergistic extraction with a mixture of di(2-ethylhexyl)phosphate acid(D2EHPA)and tributyl phosphate(TBP)for recovery of scandium from red mud leaching solution is *** effects of D2EHPA concentration,H_(2)SO_(4)concentration,rare earth elements,dosage of TBP,phase ratio(A/O),contact time and H_(2)O_(2)concentration on scandium extraction were *** results show that more than 99%scandium is extracted under the optimal conditions while Fe,Al,Ti,Ca and rare earth elements(Ce,Y,La,Nd,Er,etc.)are hardly *** stripping efficiency of Sc reaches above 92.37%under the optimal stripping conditions of 5 mol/L NaOH with an A/O of 1 at 90℃for 30 *** proposed technology could provide an effective method for extraction of scandium from red mud leaching solution.

关键词： Scandium Red mud leaching solution D2EHPA/TBP Solvent extraction Rare earths

Simultaneous enhancements of strength and toughness by multiscale lamellar structure in Ti_(2)AlNb based intermetallic

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Journal of Materials Science & Technology 2024年第7期174卷 249-261页

作者： Fan Zhang Weidong Zeng Penghui Zhang Haoyuan Ma Jianwei Xu State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Defense Technologies Innovation Center of precision forging and ring rolling School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Multi-scale lamellar structure significantly improves toughness of Ti_(2)AlNb based alloys,which are inher-ently brittle intermetallics,without compromising their *** structure was achieved through-B2-transus-forging(TBTF)combined with O+B2 two-phase region heat *** types of multi-scale lamellar structures were obtained by controlling the cooling rate after *** variations were mainly attributed to differences in the distribution,content,and size of the thick lamellar O phase and the size and crystallographic orientation of B2 *** analyzing the microstructural characteristics and crystallographic orientation near the crack propagation path,it was found that the crack propaga-tion resistance of thick lamellae,sub grain and grain boundaries(GBs)O phase increased sequentially,accompanied by more tortuous crack propagation ***,B2 grains with high misorientation significantly deflected the crack propagation by cleavage ridges between adjoining cleavage ***-tionally,the development of numerous secondary cleavage ridges,resulting from the transition through varying secondary cleavage planes in distinct sub B2 grains,further hindered the quick propagation of *** was clarified that the cleavage planes were dominantly belonging to{110}.These findings pro-vided valuable guidance for the design of damage tolerance strategies for Ti_(2)AlNb-based intermetallics.

关键词： Multiscale lamellae structure Fracture toughness Crack propagation Ti_(2)AlNb-based intermetallic Through-B2-transus-forging

Preparation of panda-shaped photonic crystal fibers with and without silver wire

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Chinese Optics Letters 2024年第5期22卷 29-35页

作者：娄俊波杨永辉曲强李曙光 school of Electronic and Information Engineering University of Science and Technology LiaoningAnshan 114051China State Key Laboratory of Metastable Materials Science&Technology and Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China

A method of preparing panda-shaped photonic crystal fibers(PCFs)based on secondary drawing technology is proposed in this *** secondary drawing can not only reduce fiber diameter but also reduce core size by adding a glass ***-filled and non-silver-filled panda PCFs are *** two ends of silver-filled panda PCF are connected with a broadband light source and a spectrometer,respectively,and the surface plasmon resonance phenomenon is *** secondary drawing technology provides a meaningful reference for the preparation of PCF in the future,and the prepared silver-filled panda PCF can be prepared into an optical fiber filter.

关键词： photonic crystal fiber secondary drawing technology air pressure regulation surface plasmon resonance

Molecular insights into clinical trials for immune checkpoint inhibitors in colorectal cancer:Unravelling challenges and future directions

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World Journal of Gastroenterology 2024年第13期30卷 1815-1835页

作者： Samantha Sharma Naresh Singh Anita Ahmed Turk Isabella Wan Akshay Guttikonda Julia Lily Dong Xinna Zhang Mateusz Opyrchal Department of Medical and Molecular Genetics Indiana University School of MedicineIndianapolisIN 46202United States Division of Hematology/Oncology Department of MedicineIndiana University School of MedicineIndianapolisIN 46202United States Melvin and Bren Simon Comprehensive Cancer Center Indiana University School of MedicineIndianapolisIN 46202United States

Colorectal cancer(CRC)is a complex disease with diverse etiologies and clinical *** considerable progress in development of CRC therapeutics,challenges remain regarding the diagnosis and management of advanced stage metastatic CRC(mCRC).In particular,the five-year survival rate is very low since mCRC is currently rarely *** the past decade,cancer treatment has significantly improved with the introduction of cancer immunotherapies,specifically immune checkpoint *** aimed at blocking immune checkpoints such as PD-1,PD-L1,and CTLA-4 target inhibitory pathways of the immune system,and thereby enhance anti-tumor *** therapies thus have shown promising results in many clinical trials alone or in *** efficacy and safety of immunotherapy,either alone or in combination with CRC,have been investigated in several clinical *** trials,including KEYNOTE-164 and CheckMate 142,have led to Food and Drug Administration approval of the PD-1 inhibitors pembrolizumab and nivolumab,respectively,for the treatment of patients with unresectable or metastatic microsatellite instability-high or deficient mismatch repair ***,these drugs benefit only a small percentage of patients,with the benefits of immunotherapy remaining elusive for the vast majority of CRC *** this end,primary and secondary resistance to immunotherapy remains a significant issue,and further research is necessary to optimize the use of immunotherapy in CRC and identify biomarkers to predict the *** review provides a comprehensive overview of the clinical trials involving immune checkpoint inhibitors in *** underlying rationale,challenges faced,and potential future steps to improve the prognosis and enhance the likelihood of successful trials in this field are discussed.

关键词： Colorectal cancer Immune checkpoint inhibitors Clinical trials Immunotherapy Microsatellite instability Microsatellite stability DNA mismatch repair

The Emergence of Loving Pedagogy in the L2 Affective Domain:How Affective Pedagogy Accounts for Chinese EFL Teachers’Professional Success and Job Satisfaction?

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International Journal of Mental Health Promotion 2024年第3期26卷 239-250页

作者： Yi Li Xinpeng Wang school of Marxism Changshu Institute of TechnologySuzhou215500China school of Foreign Languages Changshu Institute of TechnologySuzhou215500China

The success of teachers in professional environments has a desirable influence on their mental *** said,teachers’professional success plays a crucial role in improving their mental *** to the invaluable role of professional success in teachers’mental health,personal and professional variables helping teachers succeed in their profession need to be *** the role of teachers’personal qualities has been well researched,the function of professional variables has remained *** address the existing gap,the current investigation measured the role of two professional variables,namely job satisfaction and loving pedagogy,in Chinese EFL teachers’professional *** do this,three validated scales were provided to 1591 Chinese EFL ***’answers to the questionnaires were analyzed using the Spearman correlation test and structural equation *** data analysis demonstrated a strong,positive link between the ***,loving pedagogy was found to be the positive,strong predictor of Chinese EFL teachers’job satisfaction and professional *** findings of the current inquiry may help educational administrators enhance their instructors’professional success,which in turn promotes their mental and psychological conditions at work.

关键词： Professional success mental health psychological condition loving pedagogy job satisfaction EFL teachers